For this case we must factor the equation of the second degree of the form
![ax ^ 2 + bx + c = 0](https://img.qammunity.org/2020/formulas/mathematics/high-school/sbletey3gjlyp38ihwqyczkdpf2s5u0sfw.png)
To factor, we must find two numbers that when multiplied result in -12, and when summed give as result +1.
Those numbers are +4 and -3.
Taking into account that
and that different signs are subtracted and the sign of the major is placed.
![(4) * (- 3) = - 12\\+ 4-3 = + 1](https://img.qammunity.org/2020/formulas/mathematics/high-school/juxfszetmllznqn6rueemivmrtxbkmk8k2.png)
Thus, the factored expression is:
![(x + 4) (x-3) = 0](https://img.qammunity.org/2020/formulas/mathematics/high-school/w4cpbv5ikdb3j3ypzozdjl4eqoemixx7gd.png)
Answer:
![(x + 4) (x-3) = 0](https://img.qammunity.org/2020/formulas/mathematics/high-school/w4cpbv5ikdb3j3ypzozdjl4eqoemixx7gd.png)